Typewriting machine



G. A. SEIB TYPEWRITING MACHINE Oct. 23, 1928.

Filed Feb.

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ATTORNEY Patented Get. 23, 1928.

nan'rsn stares GEORGE SEIB, OF ILION, NEW YORK, ASSIGNOB TO REMINGTON TYPEWRITER COM- PANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

TYPEWRITING MACHINE.

Application filed. February 19, 1926. Serial No. 89,350.

My invention relates to anti-rebound devices for typewriting machines, and has for its general o-biect the provision of new and improved anti-rebound devices whlch Wlll prevent the carriage from rebounding when arrested at the end of a tabnlating or free run by the coaction of the tabulator stops. More specifically, my invention 1s an improvement on the anti-rebound devices dislosed in the patent to TV. J. Barron, No. 998,946, granted July 25, 1911.

To the above and other ends which w ll hereinafter appear my invention consists in the features of construction, combinationsof devices and arrangements of parts hereinafter described and particularly pointed out in the claims.

In carrying out my invention in the present, instance, I employ a pawl or detent and a coacting toothed or rack member which are normally separated but are rendered effective by the actuation of the tabulatlng mechanlsm. The tabulating mechanism which employ with the preferred form of my invention herein disclosed is that found in the No. Remington typewriting machine, which comprises a set of key-actuated decimal or denominational stops and a cooperating series of key-set column stops mounted on a stop bar on the carriage, there being a column.

stop for each of the letter space positions which the carriage may occupy 111 its movement from right to left. the column stops themselves as a rack mem ber, thus dispensing with a separate rack. I provide, further, an anti-rebound attachment comprising a support or bracket which may be readily applied to and detached from the frame of the machine. Mounted on this de tachable bracketis a universal device or pivoted shutter which controls a spring-pressed detent, dog or pawl, holding said pawl normally out of engagement with the rack,

which as stated is composed of the series of key-set column stops. posed in front of the stop ends of the set of denominational stop blades, so that when any of the tabulator keys is actuatedto project or operate one of said stop blades the latter will act against the shutter, causing it to release the detent or pawl which will swing into engagement with the column stops,

the construction being such that when the.

carriage is arrested at the end of its tabu- I avail myself of v The shutter is dis-,

lating run it will be prevented from rebounding by the coaction of the end of the pawl with the sideof one of the column Figure 3 is a fragmentary front elevation showing my invention and associate parts.

Figure 4 is a vertical sectional view taken on planes indicated approximately by the section line 2-2 in Fig. 1 andlooking in the direction of the arrow at said line, said Fig. t, however, showing the anti-rebound mechanism in operation.

Figure 5 is a perspective view of a special end stop associated with the series of regular column stops. I

Figure 6 is a perspective view of the antirebound attachment.

As appears from Fig. 1, the-Remington typewriting machine is provided with a main frame comprising a base 1, posts 2 and a top plate 3, surmounted by fixed guide rails, of which the rear rail 4 only is shown, said rails being grooved to cooperate through anti-friction rollers 5 with the oppositely grooved front and rear bars of a traveling carriage, the rear bar being shown herein and numbered 6. The front and rear bars of the carriage are connected by end'bars, of which a fragment of the left-hand end bar 7 appears in Fig. 1. As is Well'understood, the carriage supports or carries a cylindrical platen with the front facewhereof cooperate print ing instrumentalities whichare omitted from down into intermeshing engagement with a feed pinion 11. Said pinion is mounted above the top plateand is operatively connected with a toothed escapement wheel 12 with which escapement dogs (not shown) cooper ate to afford letter space feed movements of the carriage leftward in its bearings under the impelling force or pull of the usual carriage motor or spring drum.

The present form of my invention is associated with the built-in denominational tabulating mechanism provided with some styles of Remington typewriting machines, such as the No. 30 Remington, said mechanism comprising a toothed support or stop bar 13 arranged lengthwise of the carriage behind the platen, and supported by arms or brackets 14 secured to the carriage. The teeth 15 of the stop bar are at regular or letter space intervals apart, and mounted in the spacesbetween said teeth are a. series or set of column stops, each stop 16 provided with a catch or retaining device 17 The body portion of each stop 16 is slotted as indicated at 18 to fit over the stop bar on which the column stops are adapted to be slid fore and aft, so that they may be set for cooperative engagement with denominational stops mounted on the frame orcmay be withdrawn out of use. These sliding movements to set the column stops in effective or ineffective positions on their support are preferably controlled by so-called key-setting devices of the usual construction. It will be understood that the series of column stops correspond in number with the letter space positions to which the carriage and platen may be moved, there being; a column stop for each letterspace position. Also it will be apparent that the portions of the column stops 16 projecting above the stop bar or support 13, provide in effect a series of. teeth regularly spaced apart at letter space intervals, and as will be clear froman inspection of Figures 1, 3 and 4, the regularity of this series of projections or teeth will not be disturbed whether the stops are set in their rearward or forward positions on the stop bar, at least so far as the portions directly above the stop bar are concerned. This, of course, is due to the fact that the upper edges of the settable stops 16 are of sufficient length to allow for their restricted sliding movements transversely of the stop bar.

Adapted to cooperate with the column stops when they are in their projected or rearwardly set positions on the stop bar are a set of denominational stop members, or levers 19. The denominational stop members 19 are in the form of angular bars or blades vertically disposed and housed within a supporting frame or housing 20 which is arranged behind the typewriting machine and is detachably secured thereto, said members being adapted to swing or pivot on a rod 21 mounted on said frame. The upper ends of the members or blades 19 are angularly disposed, projecting forward through a guide plate 22. secured to the top of the hood or housing 20 and terminating in contactive projections or steps proper 23, which are adapted to beprojected forward into the path of the rearwardly set column stops. The lower end of each stop blade or member 19 is provided with a nose or contact portion 24 which is adapted to bc operatively engaged by the U-shaped rear end portion 25 of a rod 26 which extends forward under the base 1 of the machine, there being of course, a rod 26 for each denominational stop member 19. The series of rods 26 are guided at the rear by a guide plate 27 and at the front by an angular guide plate 28 formed with holes 29 through which the front end portions of the rods 26 project. The guide plate 23 is secured by screws 30 to the under side of a bottom frame plate 31. An upper plate or comb 32 and the plate 31are slotted to provide guides for the key stems 33 of the built-in denominational tabulator, the stems being provided at their upper ends with key caps or buttons 34. Each key stem 33 ,operatively engages with the end portion 35 of an arm 36 projecting angularly forward from a main arm 37 which exten ds downward from a stationary pivot 38. The lower end of the arm 37 ofthe lever member is connected with the associate slide rod 26 in a manner best disclosed in Figs. 1 and 2. Each rod 26 is provided with a cylindrical collar 39 which is secured to the rod by a headed set-screw 40. The set-screw passes through an elongated slot 41' in thelower end of the associate arm 37, the head of said screw covering the slot and preventing disengagement of the lever arm. The construction is such that a loose connection is afforded between the lever members: 3537 and the rods 26, so that while the movement of the rods is a sliding one and the movement of the lever members is pivotal about the center 38, there is no binding or hampering of the parts. It will be understood that when one of the denominational tabulator keys 34 is depressed, its stem 33 will be slid downward in the guide plates 31 and 32 and will turn the connected lever 35 37 on its axis or pivot 38, this movement being transmitted to the connecting rod 26 whichwill be moved or slid rearward in its bearings, pushing;

rearward against the nose 24 of the associate stop member 19 which will be thereby swung on its pivot 21, projecting its stop or Contact portion 23 forward into the path of the set column stops 16. This actuation of the stop blades is in opposition to restoring springs 42 which are secured to the tabulator frame 20 and act at their free ends against projections 43 on the stop members.

A t each tabula ting operation the carriage is preferably released automatically, this being effected in the present instance by releasing devices .comprisinga pinion 44 which normally underlies the said rack 10 but is separated therefrom. Sai d pinion is or may be part of a retarding mechanism which is mounted on a rocking frame 45 pivoted at 46 on a bracket Loses-as 47 mounted above the top plate. The pinion 44 turns on a bearing in said frame and is also adapted to rock therewith. In rear of the pivot 46 the rocking frame has pivotally connected to it at 45 the upper end of a bent link or connecting member 48, the lower end whereof is pivotally connected at 49 with a projection 50 from a bail or frame shaped like an inverted U and comprising side arms 51 from which project pintles 52 engaging in fixed bearings 53. The lower end portions of the arms 51 are formed with holes 54 which pivotally engage with projections 55 from the sides of a slide frame 56 which terminates at its rear in a cross portion or contact bar 57. Said bar is engageable by contact portions 19 on the denominational stop members 19. The frames 56, 57 has connected to it a restoring spring 58, the front end whereof has a fixed anchorage 58 When any tabulating key 34 is actuated thereby rocking the connecting stop member 19, the projection 19' thereon will act against the contact bar 57, sliding the frame 56, 57 rearward, rocking the bail on its pintles 52, and actuating the link 48 which will rock the frame 45 and swing the pinion 44 up into engagement with the rack 10, lifting said rack out of engagement with the feed pinion 11. The parts of the mechanism are so proportioned and timed that the actuated denominational stop 23 will be projected into operative position before the carriage is released by the disconnection of the rack 10 from the pinion l1 and thereby freed for an uninterrupted movement leftward under the impulse of the carriage motor. Such movement or tabulating run will continue until the engagement of the proximate set column or carriage stop 16 with the projected contact portion 23 of the operated denominational stop member or frame stop, resulting in the arrest of the carriage at a predetermined point.

One of the defects frequently found in the operation of tabulating mechanism is that the reaction on the traveling member or carriage arising from impact of the cooperat ng tabulator stops, sometimes causes a jumping back or rebound and results in an arrest of the carriage not at the predetermined point but at a point one or more letter spaces away from it. This defect is more likely to occur, of course. when the tabulating run or free. movement of the carriage is a long one, thereby resulting in a stronger or more powerful impact of the tabulator stops. To guard aaainst this defective operation I have provided anti-rebound devices, one of the features of which is the employment of the series of column stops themselves as an anti-rebound device or member, the column stops serving in effect as an anti-rebound rack, in conjunction with an automatically operating detent, dog or pawl which is normally ineffective but is brought into use by key controlledmeans comprising the stop members 19, 23. The key controlled dctent or pawl is part of an anti-rebound contrivance or attachment which is best shown in Fig. 6. Said attachment is adapted for ready application to and ward ly extending arm 61 bent downwardly at its front end portion and terminating in a rearwardly extending lip 62, and further comprises lateral upwardly extending cars 63. Said ears receive a pivot pin 64 which projects outside said ears and provides a support for the curled end portions 65 of a universal member or controller which is in the form of a shutter or apron 66 extending crosswise, and from the end portions of which the curled ends or bearing cars 65 project upward. fit its right-hand end the shutter or apron has a forwardly bent portion terminating in a finger or extension 67 which is adapted to cooperate with the tail 68 of a detent member or pawl 69 perforated to receive a pivot pin 70 having outwardly projecting ends which en gage in bearings provided by parallel projections on an inclined lateral extension 71 from the arm 61. Said bearings, numbered 71, are formed in effect by slotting the extension 71 so that said hearings or projections 71 may embrace the pawl 69 loosely between them. The projections 71 are bent or curled round the projecting portionsof the pin 7 O. Surrounding the rod or pin 64 between the cars 63 is a coiled spring 72 which has its right end abutting against the bracket 59 and its left end engaging with the shutter 66 in such a Way as constantly to press rearward thereagainst, so that the shutter is impelled towards the rear about its pivotal axis 64, and the finger 67 acting against the tail 68 of the pawl 69 tends to maintain said pawl lifted or swung upward about its pivotal axis. A second spring 73, bent to engage two holes in the shutter 66 and thus anchored thereto, engages at its forward free end in a hole in the tail 68 of the pawl, so that said spring tends constantly to lift said tail and swing the engaging end of the pawl downward about its pivot 70. Normally, however, the stronger spring 72, acting against the holding device shutter 65, 66 and through the finger 67, overcomes the Weaker pressure of the spring 73 on therpawl 69 and maintains or holds said pawl in contact with the extension or inclined portion 71 at its under side, said portion acting as a stop for the pawl.

The bracket 59 replaces a somewhat similar bracket hitherto employed and which acted as a stop or abutment to prevent the stop bar 13 from being bent or distorted while be loo lit)

ing cleared of the set column stops preliminary to stop-resetting operations. This abut- I ment function is fulfilled by the bracket 59 and particularly by thelip 62 thereof, said bracket, however, also performing the additional function of providing a support for the anti-rebound devices that are mounted on it. The bracket 59 and the parts carried by it are detachably secured to the top of the tabulator frame or hood 20. To this end the cross portion 60 of said bracket is formed with slots 7 5i andround holes 75. These latter holes receive dowel pins 7 6 which are driven into the top of the frame 20 while the slots 74 receive headed screws 77 which are threaded into the top of said frame. When the bracket thus secured in place its lip 62 will be in register with the slots 18 in the column stops 16, the end of said lip terminating just forward of the face of the stop bar 13. Also the lower edge portion of the shutter 66 will extend across the series of denominational stops 23 and will project downward far enough to be engaged by the upper end portions of each and all of said stops when they are thrust forward during tabulating operations. Furthermore, the pawl or dog 69 will overlie or be in the plane of the upper parts of the column stops 16 although normally separated therefrom or out of engagement therewith (Figs. 1 and As a consequence, at each operation of a tabulator key 34 the projected tabulator stop 23, engaging with the shutter or controlling device 66, will swing it forward about its pivot 64, raising the finger 67 and auton'iatically releasing the pawl 69 from its holding means so that it will be s 3ring-pressed downward into engagement with the upper portions of the column stops 16, as shown in Fig. 4. The parts are so disposed that during subsequent leftward movement of the carriage the pawl or detent device thus rendered automatically operative, will click idly over the column stops, but when the carriage is arrested by the coaction of the actuated tabulator stop 23 with the proximate coacting tabulator stop 16 any tendency to rebound will be prevented by the end of the pawl which will serve as an abutment for the tabulator or column stop 16 with the side it is engaged at the moment of arrest, as will be clearly understood from an inspection of Figure 4. The end or tip of the pawl isshapedor inclined to give suflicient area of contact with the engaged column stop, said pawl being prevented from dropping too low by the upper edge of the adjacent column stop 16. On release of the tabulator key 34lthe parts will be restored to normal position by the restoring springs, the holding means comprising the spring pressed shutter 66 returning the pawl to inoperative position.

In case of the movement of the carriage to or near extreme leftward limit, the pawl 69 would completely clear the series of column stops, and if at this time it should be free or released, so that it would drop down as far as it could, and then the carri -ige were returned rightward with considerable force, it might result in distortion or disruption of the pawl n'iounting, or of some of the other parts. To insure against this, I have provideo an end stop of special construction.

Said end stop, shown detached in Fig. '5 and stop member 7 8 in a substantially fixed relationship therewith. The inclined arm 81 acts as a cam, being so disposed that under the conditions above specified, when the carriage is returned towards the right, the end or tip of the pawl engaging with the inclined arm or cam 81 will gradually elevate or swing the pawl upward so that it will clear the top of the end stop 78. Should the pawl then click down to engage with the next column stop, such engagement will not be at a dis advantageous angle, so that danger of distortion or disarrangement of the parts. is avoided.

It will be observed that by the present invention there is provided anti-rebound means which make use of the column stops themselves as a rack or anti-rebound device, and that the only parts required outside of the regular construction are included in an attachment which may readily be applied to existing styles of typewriting machines; that the rack-and-pawl mechanism thus provided and working in combination with the tabulating mechanism comprises certain devices which are common to both mechanisms, namely, the members or devices 16, which serve as column stops for the tahulating n'icchanism and also as a rack for the antirebound mechanism, thus obviating the necessity of providing separate rack or element to work in con'ibination with the anti-rebound pawl.

Various changes may be made without dcparting from my invention.

YJhat I claim as new and desire to secure by Letters Patent, is z- 1. In a typewriting machine, the combination of a carriage, tabulatin mechanism, and raclnand-pawl mechanism effective to prevent rebound of the carriage at the end of a tabulating run, said mechanisms including certain tabulator stop devices which are common to both mechanisms and also a pawl l on which is mounted independently of all ofthe tabulator stops comprised in the tabulating mechanism.

2. In a typewriting machine, the combination of a carriage, tabulating mechanism including a set of column stops and cooperating stops, and rach-and-pawl mechanism e1"; fective to prevent rebound oi the carriage during tabulating operations, said mecha nisms including certain tabulat-or stop dcvices which are common to both mechzmisms, said comn'ron stop devices comprising a stop bar and the set of column steps which are mounted on said bar at letter space distances apart, the pawl of the racl-z-and-pawl mechanism being mounted independently of all of the tabulator stops comprised in the tabulating mechanism. I

3. In a typewriting machine, the combination of a carriage, a tabulating mechanism includin a set of stops spaced apart at regular intervals and stops cooperating with said set ofstops, and a device mounted independently of all of said stops and normally separated from said stops but rendered coactivewith said set 5 stops when the tabulating mecha nism is operated to prevent rebound of the carriage at the end of the tabulating run.

4. In a typewriting machine, the combination of a carriage, tabulating mechanism 1neluding a set of stops arranged a letter-space distance apart from each other-and a cooperative stop, and a dog or pawl normally separated from all of said stops but rendered coactive with said set of stops when the tabulating mechanism is operated to prevent rebound of the carriage.

5. In a typewriting machine, the combination of a traveling carriage, tabulating mechanism including a series of settable column stops, a stop bar on which said stops are arranged at letter space lntervals and aremovable into and out of set or effective positions thereon, and an -antirebound detent or dog that is rendered automatically effective when the tabulating mechanism: is operated, said detent being adapted to coact with all of the column stops including those that are set or efieetive and those that are temporarily of use.

6. In a typewriting machine, the combination 01": a carriage; tabulating mechanism including a stop bar on the carriage, a set of column stops adjustably supported on said stop bar a. letter-space distance apart, stops cooperative wit said set of column stops and a detent device mounted on the frame of the machine independently of all of the stops comprised in the tabulating mechanism and normally separated from said column steps but automatically brought into effective relationship therewith to prevent rebound of the carriage when the tabulating mechanism is operated.

7. In a typewriting machine, the combinaout tion of a carriage tabulating mechanism comprising column stops, and key-actuated cooperating stops; and a. pawl engageable with said column stops to prevent rebound of the carriage when the tabulating mechanism is actuated, said pawl being controlled by. the key-actuated cooperating stops of the tabulatin mechanism.

8. n a typewriting machine, the combination-of a carriage; denominational tabulating mechanism including a set of column stops and a set of denominational stops; an anti-rebound pawl or dog cooperative with said column stops, and a universal device actuated by each of said denominational stops to render said pawl effective.

9. Ina typewriting machine, the combination of a carriage; tabulating mechanism including a set of column stops and a set of denominational stops; an anti-rebound pawl; a shutter operative directly by each of said denominational stops; and operative connections betweensaid pawl and said shutter.

10. In a typewriting machine, the combination of a carriage; tabulating mechanism including a set of column stops and a setof clenominational stops; an anti-rebound pawl; a spring constantly tending to throw said pawl into engagement with said column stops; and a pivoted plate coacting with said pawl and normally overcoming said spring to render said pawl ineii'ective; said plate being operas tive by each of said denominational stops to release said pawl.

11. In a typewriting machine, the combination of a carriage, tabulating mechanism therefor comprising a set of key-controlled denominational tabulator stops, anti-rebound rack and pawl mechanism comprising a pawl, and operative connections between said pawl and said denominational stops.

12. In a typewriting machine, the combination of a traveling carriage, a stop bar thereon, settable column stops arranged at letterspace intervals substantially throughout the operative length of said bar, key-operated de-, nominational stops on the frame of the machine, carriage-releasing mechanism automatically operative thereby, a spring-pressed detent cooperative with said column stops but normally separated therefrom, and a univ versal plate actuated by said denominational stops to release said detent and render it effective to prevent rebound ot the carriage.

13. In a typewriting machine, the combination oi a traveling carriage, a stop bar thereon, scttable column stops arranged at letter space intervals throughout the length of said bar, a detachable tabulator frame on the main frame of the machine, key actuated denominational stop blades mounted in said tabulator frame, a shutter on said tabula-tor frame controlled by each of said stop blades, a detent on said tabulator frame controlled by said shutter, and a spring tending to throw lll' said detent into engagement with said column stops but normally overcome by said shutter.

' ing a plurality of column stops, in combination with an anti-rebound attachment comprising a support detachable independently of said tabulating mechanism and having an anti-rebound pawl mounted thereon, said pawl being normally separated from said column stops but being releasable by the tabulator keys so as to engage with the column stops to prevent rebound of the carriage, the pawl being withdrawn out of engagement when the actuated tabulator key is released.

15. Ina typewriting machine, a carriage and key-actuated tabulati 11g mechanism thercfor, in combination with an antiqrebound attachment comprising a detachable support, a dog and a dog controller, said dog and said controller being mounted on and detachable with said support, said controller normally holding said dog separated. from the column stops of said tabulating mechanism, the op eration of the tabulating mechanism being effective on said COIltIOllOftO cause it to release said dog.

16. In a typewriting machine, a carriage and denominational tabulating mechanism therefor, in combination with an anti-rebound attachment comprising a detachable support, a universal device and a pawl, said universal device and said pawl being mounted on said support, said universal device normally holding said pawl out of effective en gagement with'the column stops of the tabulating mechanism, the denominational stops of said tabulating mechanism acting on said universal device to cause it to release said pawl.

17. In a typewritingmachine, a travelingcarriage and tabulating mechanism therefor 7 comprising column stops and cooperating denominational stops in combination with an anti-rebound attachment comprising a de tachable bracket, a spring pressed shutter pivoted on said bracket and lying in the path of the denominational stops, and a spring pressed pawl also pivoted on said bracket and normally held out of action by a projection on said shutter, the denominational stops of said tabulating mechanism actuatin said shutter to release said pawl for cooperation with the column stops.

18. A stop for typewriting machines comprising a stop portion and an inclined portion terminating in a slot or notch for embracing the stop support.

19. Tabulating mechanism for a typewriting machine comprising a stop bar, column stops thereon, and an end stop associated with said column stops and having in addition to the usual stopping face an inclined portion which fits over the stop bar. a

20. In a typewriting machine, the combination of a carriage, tabnlating mechanism including a stop bar and a series of stops ar ranged at letter space intervals thereon, an anti-rebound pawl cooperative with said series of stops at the ends of tabulating runs, and an end stop associated with said series of stops and having an arm or face disposed at an angle to the body portion of said end stop and adapted to exert a camming effect on said pawl during return movements of the carriagc.

21. In a typewriting machine, the combination of a traveling carriage, and anti-rebound mechanism comprising a rack, a dog, means for normally holding the dog separated from the rack, and key controlled means for el-easing the dog to cooperate with the rack at different points along its length.

In a typewriting machine, the combination of a traveling carriage, and anti-rebound mechanism comprising a rack, a dog, means for normally holding the dog separated from the rack, and key-controlled means for releasing the dog, said holding means including a spring for returning the dog to its inoperative position when said key-controlled means are released.

2-3. The combination with the traveling carriage of a typewriting machine and tabulating mechanism therefor, comprising column stops and a set of key actuated cooperating stops, of a single anti-rebound detent rendered effective by each of said cooperative stops to engage with said column stops.

Signed at Ilion, in the county of Herkimer and State of New York this 17th day of February, A. I). 1926,

GEORGE A. SEIB'. 

